The Rockies have claimed Sean Thompson off of waivers from the Royals. The 25 year old lefty has pitched in 20 games (17 starts) in the minors this season and he is 4-8 with a 4.04 ERA and a 1.48 WHIP. In 93.2 innings he has allowed 94 hits, walked 45 batters and whiffed 62. This was a nice low risk move by the Rockies as Thompson is a young lefty with some upside.